CPT instructions on a PLC-5/40

[fEsTiDiOuS 0]

I'm working to fix/improve the functioning of a program running on an a PLC5/40E.  I think high Scan Times are a big problem with this current program.  ((Backstory:  someone added some quasi motion control, and it sort of worked for a while.  Now that it's broken, the operators of this machine want it back. ))  I'll keep my question simple, PLC5's are new to me:

There are 36 rungs with CPT instructions as the sole output, a third of these instruction are executed every scan.  I'm going to replace them with MOV instructions.

My question is, is there any sneaky PLC5 reason to do a CPT instead of a MOV?  Is there a better way to do this?

The CPT instructions that execute move integer values to a data file used by the HMI to control the coloration of touchscreen buttons.

  Thank you for your time.

PS: I'm new-ish to this forum, please feel free to let me know if my question was asked correctly or not.

[pcmccartney1 141]

Looks to me that CPTs could be replaced by MOVs.  Don't think it will solve your scan time issues.

[BobLfoot 301]

I must say, I agree with @pcmccartney1 that scan time might not be your issue.  Have you looked at the status tab to see what the scan time is?

I suspect it is more likely someone made a change that affected the motion program in unexpected ways.